1988541378 has 12 divisors (see below), whose sum is σ = 4308506358. Its totient is φ = 662847120.

The previous prime is 1988541371. The next prime is 1988541403. The reversal of 1988541378 is 8731458891.

1988541378 is a `hidden beast` number, since 1 + 98 + 8 + 541 + 3 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1714208409 + 274332969 = 41403^2 + 16563^2 .

It is not an unprimeable number, because it can be changed into a prime (1988541371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55237243 + ... + 55237278.

Almost surely, 2^1988541378 is an apocalyptic number.

1988541378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1988541378 is an abundant number, since it is smaller than the sum of its proper divisors (2319964980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1988541378 is a wasteful number, since it uses less digits than its factorization.

1988541378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110474529 (or 110474526 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 1988541378 is about 44593.0642364931. The cubic root of 1988541378 is about 1257.5102801563.

The spelling of 1988541378 in words is "one billion, nine hundred eighty-eight million, five hundred forty-one thousand, three hundred seventy-eight".